Not sticking up for them, but it’s perhaps worth noting that the UK government has a standard called e-GIF for all their suppliers and internal projects that requires (among various other things like XML metadata) the use of published W3C standards:

[...] The Prime Minister has responded to the petition over UK government sites’ accessibility, which came about becauser of the fuss Dan Champion and I made over the Department of Trade and Industry’s disastrous redesign: “The Government is committed to ensuring that all government websites are accessible and easy to use for people with disabilities. [...]